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CONTROLLING PRESS CIRCUITS 0P PRINTING TBLEGRAPHS.

No. 326,084. PatentedSept. 3, 1885,

III

UNITED- STATES PATENT OFFI CLARENCE L. HEALY, OF BROOKLYN, ASSIGNOR TO STEPHEN D. FIELD, OF YONKERS, NEW YORK.

CONTROLLING PRESS-CIRCUITS OF PRlNTlNG-TELEGRAPHS.

SPECIFICATION forming part of Letters Patent No. 326,084, dated September 8, 1885.

- Application filed April 15, 1885. (No model.)

To all whom, it may concern:

Be it known thatI, CLARENCE L. HEALY, of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Printing-Telegraphs,

V bon, to effect the printing of the message upon such ribbon.

The object of the invention is to insure the proper operation of the press mechanism, which is the mechanism in each of the printing-machines that presses the paper upon the type, and thereby produces upon it the desired impressions, it being the purpose to cause such press mechanism to always operatewith such a positive orsustained action or blow as may be found necessary to secure a distinct and full impression upon the paper, and to effectively accomplish any other work that the press mechanism is intended to do; and it is essential that this object be attained bymeans that, when put in operation, will continue to act for a predetermined time, and independently of the operator who brings it into action, there bylessening the necessity for accuracy of action on his part, and enabling him to transmit with greater speed. The more essential reasons that make. it desirable to accomplish this end are these: As the characters to be printed from are arranged on the peripheries of the type-wheels, and as these type-wheels have practically a regular speed when running, the length of time between the printing of two succeeding characters is constantly changing with nearly every character printed, and hence the transmitting-key that is closed by the operator at the central station to send a printing or press current to the printers must be held down for correspondinglychanging periods of time. This prevents any regular action on the part of the operator, and necessitates the closest attention and care to produce good work, and this condition, together with the naturally urgent character of the business, tends to make the operator release the transmitting-key too quickly after the press-current has been established, and thereby causes the mechanism that presses the paperon the type (which is usually a vibrating lever or equivalent device so arranged that it will be put into action by operating the key or other like device for establishing a current in the press-circuit, and will continue its action in such manner as to maintain the press-current during the time necessary to effect the, proper action of the press-circuit mechanism, and will break or interrupt the presscurrent after such press mechanism has been acted upon, as required.

Figure 1' of the drawings showsaportion of s a press-circuit, a key for closing the same, and an electromagnet placed in the circuit, and operating devices arranged to hold the circuit closed in accordance with the purpose of the invention. Fig. 2 is a view of the same cir- 9 cuit and key, but showing how the invention may be carried out by the use of two magnets; and Fig. 3 shows a press-circuit operated in accordance with the invention by a local or separate circuit containing the cir- 9o cuit-closing key.

Referring to these views in detail, and first to Fig. 1, A represents a circuit running through the press mechanism of one or'more printing-telegraph machines or repeaters. B 5

is a section of atransmitting key-board, show ing one of the transmitting-keys O, the 010s ing of which establishes a currentin the presscircuit. D is an electro-magnet arranged in the press-circuit, and constructed tooact very, roo

promptly upon the passage of a current through its coils, its armature-arm E being also arranged so as to respond quickly to the slightest action of the magnet. F is a wire connecting the armaturearm E with the presscircuit. G is aswinging lever arranged to make electrical contact with the vibrating end of arm E, and is provided with a spring, II, pressing upon 'a button or block composed of the electric conductor I and the electric nonconductor J; and K is a wire connecting the button I with that part of the press-circuit that is on the side of the key opposite the connection of the armature E with the presscircuit.

By. closing the key and establishing a current in the press-circuit the armature-arm E is instantly caused to swing to contact with the lever G, and thus short-circuit the key G through the line F E G K, after which the lever E, continuing to move toward its mag net, causes spring H to leave the electrical conductor I, that it bears upon, and pass onto the non-conductor J, which produces a break in the short-circuit, which is then a portion of the pr'esscircuit, and the armature-arm and swinging lever return to their original position, it being understood, of course, that the transmitting-key was opened as quickly as the press-current was established, as is the intention. The duration of the presscu'rrent will manifestly depend upon the extent of play that the armature-arm and the swinging lever have.

These should be so adjusted that they shall come in contact with each other by the slightest practicable movement, and so that their after movement shall substantially represent the duration of the press-current.

In the printing-telegraph systems as commonly operated it is usual to work various separate circuits from one transmitting keyboard. When this is done each of the transmitting-keys is placed in a local circuit that is confined to the transmitting station and that contains one or more relays arranged to operate the press-circuits. With this arrangement the key-circuit, instead of including the press-line A, would run to one or more relays, L, and then to the ground or back to where the short circuit K is connected with this keycircnit. The relays L serve to close and open the press-circuit M after the same manner that the local key-circuit is closed and opened. In this way as many separate press-circuits may be uorked by one'key-board as may be desire In Fig. 2 I show another form of automatic short-circuiting devices. Here there are two electro-magnets in the presscircuit, the mag net 0 being sensitive and quick to respond to the slightest current, and the magnet I? being not necessarily so delicate in its action. Upon establishing the press-current the armature-arin Q instantly closes the short circuit R and cuts out the transmitting-key, as before, the press-current being thus prolonged, then brings the armature arm S into action, which.

closes the shunt circuit T U, and thereby shunts off so much of the current from magnet O 'th'at it releases its hold upon its armature, which flies back and breaks the press-circuit. It will be noticed that the armature S may have a further movement after it has struck the armaturearm Q, and this is to insure the arm Q beinglifted from its magnet and the consequent breaking of the press-circuit. Thus, if the contact-points which complete the short circuit B should stick, or if this arm Q be held down by reason of the slight magnetic power that its magnet will continue to exert after it has been shunted, then the latter part of the movement of the arm S will force it up and make the necessary break. The duration of the press-current in this apparatus may manifestly be regulated by the sensitiveness of the shunting-magnet or by the range of play that its armature has, or by both of these conditions; but it is preferred toregulate the cur rent by'the adjustment of the shunting-magnet armature. 7

In Fig. 3 I show an electro magnet, V, wound with two coils, one being in the keycircuit and one being in the press-circuit W, the press-circuit also containing a long slowacting shunt-magnet, X. Closing the transmitting-key causes the armature of the magnet V to close the press-circuit, and this circuitf'also acting upon magnet V, holds its armature down after the key-circuit may have been opened. Upon the armature of magnet X coming in contact with the armature of magnetV the latter magnet is shunted through shunt Y, and it thereupon releases its armature, or is forced to by the armature of the shunt-magnet, and the press-circuit is thereby broken. v

Here, as with the form of apparatus shown in Figs. l and 2, the key-circuit may be employed as a local circuit to operate one or more press-circuits in the manner already explained. So, too, many other forms of devices for shortcircuiting or disconnecting or cutting out the transmitting-key, or rendering it when opened ineffectual to discontinue the preSscurrent, and for holding the press circuit or circuits closed the proper length of time, are possible, as well as" other methods and means for causing the said disconnecting device to be operated from or by the transmitter-key; but the forms here shown are preferred, and they suffice to fully illustrate the principle and application of the invention.

It will now be plain that with an apparatus arranged to control the press-circuits after the manner here shown and described the action of the transmitting-operator in manipulating the keys is no longer one of necessary exactness or close attention, for so long as the key is closed, so as to establish the current through it at all, be this ever so quickly or imperfectly done, the mechanism for continuing to hold the press-circuit closed will invariably act to send the proper current to the press mechanisms; and this results in a more rapid transmission of quotations or other news, because the transmitting operator, being thus freed in great 2. The combination, in aprinting-telegraph,

of a press-circuit, a key for establishing a cur-i rent in said circuit, an e1ectro-1nagnet which is brought into action by the closing of said key and holds the circuit closed independently of the key, and mechanism operated by said magnet which breaks the press-circuit when the printing has been effected.

3. The combination, in a printing-telegraph, of a press-circuit having one or more printinginstruments placed therein, a local circuit pro-- vided with a key or similar means for establishing a currentin said circuit and operating a relay to correspondingly open and close the press-circuit, and an electro-magnet connected with said local circuit, with mechanism operated bysuch magnet for prolonging the printing-current when once established. a

4., ,The combination, in an electric circuit containing a key for operating the press mechanism of one ,or more printing-telegraph 1nstruments, of an electro-magnet whose armature is arrangedto short-circuit or disconnect the key when the circuithas once been closed and maintain the current operating the said press mechanism, and an electro-magnet arranged to shunt said short-circuiting magnet, and thus open the'circuit.

-5. The combination, in an electric circult containing akey for operating the pressmechauism of one or more printing-telegraph nstruments, of an electro-magnet whose armaand thereby maintainthe presscurrent until the printing is effected, and to then break the press-circuit. A a

OLARENOEL. HEALY; Witnesses:

ROBERT E, DUNCAN, R. F. GAYLORD.

ture is arranged to firstshoi't circuit said key, a 

